Section 12-155-125 - Plumbing contractors - requirement to display registration identification - master plumber of contractor(1) On and after July 1, 2025, a plumbing contractor shall display the following information on the plumbing contractor's vehicle or vehicles, billing materials, bid sheets, and website: (a) The plumbing contractor's Colorado registration identification number; and(b) The Colorado registration identification number for the master plumber attached to the plumbing contractor.Added by 2024 Ch. 343,§ 26, eff. 7/1/2024.